CVE-2026-73247
High
Description
Kestra is an open-source, event-driven orchestration platform. Prior to 2.0.0, Kestra's core/src/main/java/io/kestra/core/runners/pebble/functions/HttpFunction.java passes the user-controlled http() uri argument to URI.create() and the server-side HTTP client without restricting private, loopback, or link-local destinations, allowing an unauthenticated attacker to import and execute a flow that accesses internal services or cloud metadata.
SeverityHigh
CVSS8.6
Exploit probability—
ProductIo.kestra:core
PublishedAug 11, 2026
First seenAug 11, 2026
Weakness typeCWE-918Server-side request forgery (SSRF)
How to fix
Update
- io.kestra:kestra-core2.0.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| io.kestra:coreMaven | v ≤ 1.3.31 | — |
| io.kestra:kestra-coreMaven | v < 2.0.0 | 2.0.0 |
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